"It's a heartbreaking thing when you see them come here, tears in their eyes, and you try to comfort them," said Daniel Marchand, curator at the Phoenix Herpetological Society, a private sanctuary which takes in surrendered reptiles.

But PHS can no longer take in tortoises due to the scope of the current problem.

Releasing them in the wild is not the answer, because one tame tortoise with a virus can kill an entire neighborhood of wild Sonoran Desert tortoises.

Then there's the issue with people finding tortoises in the wild and turning them in to Game and Fish.

"We don't want people turning in baby tortoises," said Burnett. "They're probably wild tortoises, so we want them to leave them in the wild. Obviously, if they're in the middle of the road, move them to the side of the road, but please don't turn in baby tortoises. Let them be in the wild so they don't have to be in captivity."